Automatic stop mechanism for cord knitters



Aug. 5, 1924. 1,503,951

E. J. HUGO AUTOMATIC STOP MECHANISM FOR CORD KNITTERS Filed Aug. 22, 1923 2 Sheets-Sheet. 1

MWE/W'OR w/rmsss: w Enw/L/ l /za o Patented Aug. 5, 1924 UNITE STTES EMIL J. HUGO, F PHILADELPHIA, PENNSYLVANIA, ASSIGNO-R To L-ARGMAN, OPPEN- HEIM & GO., OF PHILADELPHIA, PENNSYLVANIA, A COPARTNERSHIP COMPOSED O'F HARRY LABGMAN, JOSEPH LARGMAN, MAXI; OPPENHEIM, AND EMIL J'. HUGO.

AUTOMATIC STOP MECHANISM FOR CORD KNITTERS.

Application filed August 22, 1923. Serial No. 658,761.

To all whom it may concern:

Be it known that I, EMIL J. HUGO, a citi- -z'en of the United States, residing at Philadelphia,county of Philadelphia, and State 5 of Pennsylvania, have invented a new and useful Improvement in Automatic Stop Mechanism for Cord Knitters, of which the following is a 'full, clear, and exact description, reference being hadto the accompanying drawings, which form a part of this I specification.

My invention relates to an improvement in;cord knitting machines of the type used for knitting fancy coverings on a core for the production of cords, and more particularly relatesto a stop device for stopping the machine upon the breaking of a covering thread.

In the manufacture of cords, that is,

threads in which: several relatively fine threads are knitted about a core thread, it is; customary to use a knitting machine of the circular type to which is fed (say) two covering threads and through which runs 2 a. core thread about which the covering threads are knitted by the needles of the machine.

In such manufacture it frequently occurs that one of the covering threads breaks,

while, due to the continued operation of the machine, the feed of the other thread to the needles is continued, with the result that the thread jams in the needles, frequently causing damage to the needles, the needle cams, and other parts of the machine, as

.well as causing the production of defective and useless product.

In order to avoid the production of defective product and to guard against damage ,to the machine, it is necessary that each jmachine in operation be carefully watched in order that if a thread breaks the machine may beimmediately stopped.

' Now it isthe object of my invention to provide means, controlled by the covering threads, whereby, when a thread breaks, the imachine will be immediately and automatically stopped.

As a result of my invention, the parts of the machine are positively protected against injury as a result of the breaking of a thread, the production of defective product is substantially eliminated, and the requirement for careful supervision of the machine is eliminated, thus enabling a very considerable reduction inthe operating force required for any given number ofmachines.

Having now indicated in "a general way the nature, purpose and advantage of my inventioinl will proceed to a detailed description of a preferred embodiment thereof, with reference to the accompanying drawings, in which- Fig. 1 is an elevation of a machine embodying my invention.

Fig. 2 is an enlarged view of a detail of construction.

Fig. 3 is a planview, on line 3-3 Fig. 1, showing the organization of the parts forming the device embodying my invention, the parts being in theposition they occupy when the machine is in operation.

Fig. 4 is a view similar to that of Fig. 3, with the parts in the position they occupy when the machine is stopped.

a represents a table upon which the base I) of the knitting machine is mounted. a represents a rotating base upon which is .HlOllIltGCl a casing (Z in which is carried the various working parts of the machine, as needles, cams, etc., and which is driven through gearing e by a belt f and driven pulley g mounted on a suitable shaft h. Shaft h is provided with a free pulley 2', adjacent pulley 9, onto which the belt,which is constantly driven, may be shifted when it is desired to stop the machine. j rep resents guides for'the covering threads 7c, In, which are led to the needles of the machine from a suitable source of supply and are knitted above a core thread A lever m is pivotally mounted on the table a and provided at the end of one arm with a belt shifting fork n, which engages the belt. A spring 0 is connected between the free arm of the lever and the table and tends to move the lever so :as to shift the belt from pulley g .to free pulley 2', a stop 79, with which the lever contacts when the belt is shifted to the free pulley being provided. The free arm of lever m is provided with a cam g.

Pivoted to the table a is a lever 9" one arm of which is connected toa crank arm .9, carried at the lower end of a suitably mounted vertical shaft t bymeans of a link a. The other or free arm of lever 1' is provided with a lug o adaptedto engage and latch, lever m 'in operative position. Securedjto the upper end of the shaft t is an arm to adapted, when the machine is in operation, to lie in the path of a pair of stops a, w, pivotally supported by brackets carried by the rotating base 0 of the machine. Supported from the inner ends of the stops w, m and provided with eyes through which the covering threads pass, are arms 2 y.

In operation, when the machine is started, lever m is moved, against the action of spring 0, to the right so that the belt will engage pulley g. Lever r is turned so that its free arm will be so positioned that lug a will engage lever m and act to latch it in position, as shown in Figure 1. The covering threads in their passage to the needles are passed through the eyes in arms 12 3 and, due to the tension on the threads, the arms are drawn in, causing stops :0, a: to lie with their outer ends raised, as in Figure 1, so that as they rotate With base 0 they Will clear arm w.

If now a thread breaks, one of the arms a will be released and under the influence of centrifugal force will fly out permitting its stop as to turn on itspivot and its outer end to come down and as base 0 rotates strike and displace arm w.

Displacement of arm 10 results in turning shaft t, which causes lever r to be moved to release stop '0 from lever m, permitting spring 0' to move lever m to shift the beltto free pulley i, which results in stopping the machine.

As the lever mmoves, the cam 1 contacts with stop 'v on lever r and causes lever o" to move, which results in the withdrawal of arm w from the path of stop a, so that stop 00 having contacted with arm w once and displaced it to allow shifting of the belt, the stop cannot contact with it again in any rotation due to momentum; thus clattering of the stop against the arm is avoided.

It will be understood that I do not intend that my invention shall be limited to the particular structural features of the embodiment of the device described, as it is obvious that the design and arrangement of structural features may be greatly varied without departure from the invention.

Having now fully described my invention, what I claim and desire to protect by Letters Patent is:

1. In a cord knitting machine, the combination with a rotatable base, knitting mecha nism "mounted thereon and driving means therefor, of means actuatable to. interrupt the drive, a member mounted adjacent said base and connected to said drive interrupting means, a stop mounted on said base tending to contact with and displace said member to cause said drive interrupting means to be actuated, means engaged by a thread passing to saidinachine adapted normally to prevent said stop from contacting with said member and upon the breaking of the thread to permit said stop to contact with and displace said member, and means carried by said drive interrupting means adapted when belt from one of said pulleys to the other,

an arm pivotally supported adjacentisaid base, a stop pivotally mounted on said base and adapted in one position to contact with and displace said arm as the base is rotated, and means controlled by a thread passing to said machine adapted to retain said stop out of position for contacting with said arm and on the breaking of the thread to permit said stop to contact with and displace said arm, means affording a connection between said arm and said belt shifter whereby on displacement of said arm said belt shifter will be moved to shift said belt from said fixed pulley to said free pulley and means actuated by the belt shifter for retracting said arm from the path of said stop.

3. In a cord knitting machine, the combination with a rotary base, knitting mechanism mounted thereon, a shaft, a fixed and a free pulley on said shaft, a belt adapted to drive said pulleys, and means afiording'a driving connection between said shaft and base, of a belt shifter adapted to shift the belt from one of said pulleys to the other, an arm pivotally supported adjacent said base, a stop pivotally mounted onsaid base and adapted in one position to contact with and displace said arm as the base is rotated, means controlled by a thread passing to said machine adapted to retain said stop out of position for contacting with said arm and on the breaking of the thread to permit said stop to contact with and displace said, arm, means affording a connection between said arm'and said belt shifter whereby on displacement of said arm said belt shifter will be moved to shift said belt from said fixed pulley to said free pulley, and means operable by movement of said shifter to retract said arm from the path of said stop.

4. In a cord knitting machine, the combination. with a rotary base, knitting mechanism mounted thereon, a shaft, a fixed and free pulley on said shaft, a beltradapted to drive said pulleys, and means affording a driving connection between said shaft and base, of a belt shifter, a spring connected to said belt shifter and tending to actuate it to shift the belt from thefixed pulley to the free pulley, a latch engaging said belt shifter adapted to prevent its actuation by said spring, an arm pivotally mounted adjacent said base, a stop mounted on said base and adapted, on the breaking of a thread passing to said machine, to contact with and displace said arm, means affording a connection between said arm and said latch whereby, on displacement of said arm, said latch will be released to permit said belt shifter to be actuated by said spring and means carried by said belt shifter adapted when said latch is released to effect a retraction of said arm out of the path of said stop.

5. In a cord knitting machine, the combination with a rotary base, knitting mechanism mounted thereon, a shaft, a fixed and a free pulley on said shaft, a belt adapted to drive said pulleys, and means affording a driving connection between said shaft and base, of a belt shifter, a spring connected to said belt shifter and tending to actuate it to shift the belt from the fixed pulley to the free pulley, a latch engaging said belt shifter adapted to prevent its actuation by said spring, an arm pivotally mounted adjacent said base, a stop mounted on said base and adapted, on the breaking of a thread passing to said machine, to contact with and displace said arm, means affording a connection between said arm and said latch whereby, on' displacement of said arm, said latch will be released to permit said belt shifter to be actuated by said spring, and means operable on actuation of said belt shifter to efi'ect a retraction of said arm out of the path of said stop.

In testimony of which invention, I have hereunto set my hand, at Philadelphia, Pa, on this 16th day of August, 1923.

EMIL J. HUGO. 

